Thre are several ways to do that. The quickest way is to click on the "magic wand" icon in the Tone section on the Adjustment | Manual tab:
That may or may not give you the results you want, so you can also/instead adjust the Exposure, Contrast, Dark, Darkest and Dehaze controls to bring out the best detail. You may also want to try the HDR Effect (located further down) to bring out darker detail while keeping the brightest areas.
See the PhD online Help
site for more details on using each of these controls.